Which sentence does not contain an adverb? They usually live in the southeastern United States and eat rabbits, rodents, and birds. The eastern diamondback rattlesnake is the largest poisonous snake in the United States. Like many other rattlesnakes, they frequently make a buzzing sound with the rattles on their tails when they feel threatened. Eastern diamondbacks grow as long as eight feet, with the average length often being two to six feet.

The answer is:

"The eastern diamondback rattlesnake is the largest poisonous snake in the United States. "

This is because adverbs tend to describe another verb or adjective (how, when, where, how much, how often.) The other sentences use words that describe things as well as words like "usually" and "frequently", which are obvious adverbs.

  plan: i will begin with a quotation about the importance of unity in a community. then, i will state my claim that an activity will unite our school by creating a shared vision, purpose, and direction. in the body, i will use three main points that describe the different avenues the students can take: through a variety of clubs, through a special event, or through an awareness week. i will provide evidence about other towns that have unity activities and the kinds of events that they include. pictures will illustrate my three main points in action. for the ending, i will restate the main idea in a new way and pose a question to keep the audience thinking.